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We are advised to take… (Class 10 Science SQP 2023-24, Q29)

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ScienceCBSE Class 10 · Sample paper, session 2023-24 · 3 marks · Short answer

CBSE Class 10 Science sample paper 2023-24: question 29

From the official CBSE sample question paper for 2023-24, section C, question 29, for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q29 · 3 marks · Short answerCompetency-basedControl and Coordination

We are advised to take iodised salt in our diet by doctors. Justify it's importance in our body.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2023-24.

Hints

Open one hint at a time and try again before the next.

Hint 1

Which endocrine gland needs iodine?

Hint 2

Name the hormone made by that gland and say what it controls in the body.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Iodine is needed by the thyroid gland to make the hormone thyroxin. Iodised salt is an easy way to get enough iodine in the daily diet.

    1 mark

  2. Thyroxin regulates carbohydrate, protein and fat metabolism in the body.

    1 mark

  3. Thyroxin provides the best balance for growth of the body. If iodine is lacking, too little thyroxin is made and the person may suffer from goitre (swollen neck). That is why doctors advise iodised salt.

    1 mark

Answer: Iodine is needed to make thyroxin, which regulates carbohydrate, protein and fat metabolism and balances growth; its deficiency causes goitre.

Where the marks are

  • Iodine is essential for synthesis of thyroxin by the thyroid (1 mark)
  • Thyroxin regulates carbohydrate, protein and fat metabolism (1 mark)
  • Thyroxin balances growth / deficiency causes goitre (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Control and Coordination, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2023-24: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.